55291800 has 48 divisors (see below), whose sum is σ = 171406440. Its totient is φ = 14744320.

The previous prime is 55291783. The next prime is 55291807. The reversal of 55291800 is 819255.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55291807) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45477 + ... + 46676.

Almost surely, 2^55291800 is an apocalyptic number.

55291800 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

55291800 is an abundant number, since it is smaller than the sum of its proper divisors (116114640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55291800 is a wasteful number, since it uses less digits than its factorization.

55291800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92172 (or 92163 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 30.

The square root of 55291800 is about 7435.8456143199. The cubic root of 55291800 is about 380.9666065620.

The spelling of 55291800 in words is "fifty-five million, two hundred ninety-one thousand, eight hundred".